Statistical Seismic Analysis by b-Value and Occurrence Time of the Latest Earthquakes in Italy

Giuseppe Lacidogna, Oscar Borla, Valentina De Marchi

Research output: Indexed journal article Articlepeer-review

1 Citation (Scopus)

Abstract

The study reported in this paper concerns the temporal variation in the b-value of the Gutenberg–Richter frequency–magnitude law, applied to the earthquakes that struck Italy from 2009 to 2016 in the geographical areas of L’Aquila, the Emilia Region, and Amatrice–Norcia. Generally, the b-value varies from one region to another dependent on earthquake incidences. Higher values of this parameter are correlated to the occurrence of low-magnitude events spread over a wide geographical area. Conversely, a lower b-value may lead to the prediction of a major earthquake localized along a fault. In addition, it is observed that each seismic event has a different “occurrence time”, which is a key point in the statistical study of earthquakes. In particular, its results are absolutely different for each specific event, and may vary from years to months or even just a few hours. Hence, both short- and long-term precursor phenomena have to be examined. Accordingly, the b-value analysis has to be performed by choosing the best time windows to study the foreshock and aftershock activities.

Original languageEnglish
Article number5236
Number of pages20
JournalRemote Sensing
Volume15
Issue number21
DOIs
Publication statusPublished - Nov 2023
Externally publishedYes

Keywords

  • b-value
  • earthquake precursor
  • Gutenberg–Richter relationship
  • occurrence time

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